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• W2003282023 abstract "We investigated the possibility of introducing exogenous T cell receptor (TCR) genes into T cells by lentiviral transduction, without prior stimulation of endogenous TCR with anti-CD3. TCR transfer is used to impose tumor antigen specificity on recipient T cells, but sustained activation required for retroviral transduction may affect the clinical efficacy of engineered T cells. Cytokine stimulation makes T cells susceptible to lentiviral transduction in the absence of TCR triggering, but this advantage has never been exploited for TCR transfer. Autoimmune diseases are a source of high-affinity TCRs specific for self/tumor antigens. We selected, from a patient with vitiligo, a Mart1-specific TCR based on intrinsic interchain pairing properties and functional avidity. After lentiviral transduction of human peripheral blood mononuclear cells, preferential pairing of exogenous alpha and beta chains was observed, together with effective recognition of Mart1(+) melanoma cells. We tested transduction efficiency on various T cell subsets prestimulated with interleukin (IL)-2, IL-7, IL-15, and IL-21 (alone or in combination). Both naive and unfractionated CD8(+) T cells could be transduced without requiring endogenous TCR triggering. IL-7 plus IL-15 was the most powerful combination, allowing high levels of transgene expression without inducing T cell differentiation (34 +/- 5% Mart1-TCR(+) cells in naive CD8(+) and 16 +/- 6% in unfractionated CD8(+)). Cytokine-prestimulated, Mart1-redirected naive and unfractionated CD8(+) cells expanded better than CD3-CD28-prestimulated counterparts in response to both peptide-pulsed antigen-presenting cells and Mart1(+) melanoma cells. This strategy allows the generation of tumor-specific T cells encompassing truly naive T cells, endowed with an intact proliferative potential and a preserved differentiation stage." @default.
• W2003282023 created "2016-06-24" @default.
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• W2003282023 date "2009-12-01" @default.
• W2003282023 modified "2023-09-23" @default.
• W2003282023 title "T Cell Receptor (TCR) Gene Transfer with Lentiviral Vectors Allows Efficient Redirection of Tumor Specificity in Naive and Memory T Cells Without Prior Stimulation of Endogenous TCR" @default.
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• W2003282023 doi "https://doi.org/10.1089/hum.2009.117" @default.
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